Apparatus for the determination of the direction of the axis of rotation of a body



I H. HORT APPARATUS FOR THE DETERMINATION OF THE DIRECTION OF THE AXIS I OF ROTATION OF A-BODY Filed Am; 28 .4921 1 2 Sheets-Sheet 1 Dec. 4,1933. 1,476,077

H. HQRT APPARATUS FOR THE DETERMINATION OF THE DIRECTION OF THE AXIS 0F ROTATION OF A BODI I Filed April 28 I92} 2 Quota-Sheet Z Patented Dec. 4-, 1923 UNETEEE,

* tamer? HERMANN HQRT, or :assnn, GERMANY, ,assrenoia TO rarn'n. xaorr AKTIENGESELL-T soHAr'r, OF-ESSEN-ON-THE-BUHR, GERMANY. Y

APPARATUS non THE nn'rnaivrmsrron or 'rrr'n DIRECTION or THE AXIS onaora rrolv OFABODY'J Application filed April as, 1921 "Serial no. 465,255.

To all whom z'tmay concern:

Be it known that I, HE MAN HoR r,.residing at Essen, Germany, a citizen of the German Republic, have invented a certain new and useful Improvement'in Apparatus for the Determinationlof the Direction of the Axis of Rotation of a Body, of which the following is a specification.

This invention relates to apparatus for setting the axis ,of rotation of one body in a position parallel with the axis of rotation of a second body, in which in accordance with claim 3 of my Patent N0. 1,434,209, both rotatable bodies are each provided with an-optical instrument which has asighting line running in a transverse direction to the axis of rotation of the rotatable body belonging thereto, .and of which optical instruments that belonging to the first-named rotatable body, which latter can be set by adjusting devices arranged on its bearing, is 00113 structed in the form of a telescope sight.

In the specification of my above-mentioned former patent application it has been proposed to effect the parallel setting of the .two axes of rotation, by bringing, within the field of view of the sigh-ting telescope mounted on the first bodytransversely to its axis of rotation, the cross wires of this telescope sight into register, by eye-sight,

' with cross wires which are present in the image ofthe mark of the optical instrument mounted on they second rotatable body 7 transversely to its axis of rotation.

Now the object of my present invention is to increase the. accuracy of the adjustment by which the parallel setting of the two axes of rotation is effected. f

The invention will be described with reference to the accompanying drawings,

I ,which show,b y way ofexample, the apparatus as applied to the arrangement of'Fig-f i a' collimator, while whenxthe incandescent ure 2 of my above-mentioned formerspecification. I, 1 i Fig- 1 being a sideelevation of the arrangement and the apparatus a'pplied there to and- Fig. 2 the corresponding plan view, in

accordance with Fig. 2 of the'former specification, i

Fig. 3 a portion of Fig. 2, represented on a larger scale,

Fig.4 a front view of the parts shown in Fig. 8, looking from the left (in the direction of the arrow 00 shown in Fig.3),

Fig. 5 is a sideelevation of an additional apparatus forming part of the invention, likewise represented on a larger scale, and

Fig. 6 a sectionon line 6-6 of Fig. 5 looking. from above.

The same reference letters are used to denote the several parts of the apparatus. K K K denote the two rotatablebodies which are constructed in the form of sighting telescopes and the axes of rotation of which are to be setparallel with each other, andv it isassumed, as in my former patent specification, that the axis of rotation of f the body K K K situated over. the left hand gun B A is the one which is to beset, while the axis of rotation of the body K K K situated over the right hand gun retains its position unaltered. The:

base plates J, which rest, by means of the adjustable levelling screws 2' on the ad-fli justing tables H form'the bearing'with respect to which each of the two bodies K K K can be rotated. The twov optical instruments which are mounted-transversely to the axis of rotation of the bodies K K K are formed by the sightingtelescopes M, which are rotatably mounted on the bod- 5 ies K K? K by means of the pivots m arranged at right angles to the axis of rotation of the bodies K K K The telescopefM appertaining to the rightv hand 4' body K K K is provided, in front of its eyepiece, with an incandescent lamp m"- for the purpose of illuminating the image of'its mark, which lamp m can be swungv aside, When this lamp is swung intoposition and'the imageof the mark is il luminated, the telescope consequently acts as? lam m is swun aside it can be'g'used as p b 7 p V asighting telescope. I 1

- The above-described; arrangement'corresponds to the arrangement described- .in my f rotation. of which has to retain its position unchanged, has fixed' to it, a dovetail guidpiece 76 (Figs. 3 and 4) in which a level scale N carrying a division n can be moved longitudinally and is adjustable along a scale 76 of a guidingpiece 70 in such a manner (which'will not be described in detail here) that the zero point ot'the division n lies in the plane passing through the sighting line of the corresponding sighting telescope M parallel with the axis of the pivots m The position of the level scale N is so selected, that the left hand telescope M can be directed thereon. On the vdeck D of the ship there is mounted to one side (see Figure 2) a second levelscale P of circular section (see Figs. 5 and 6) carrying a plurality of parallel divisions p which level scale P may be displaced longitudinally within a slotted sleeve 9 secured to a base plate Q.

To set the axes of the two bodies K K K parallel with each other the two telescopes- M are first turned towards each other so that the cross wires of the telescope M of the right hand gun A B, illuminated by the incandescent lamp mflappear in the field of view of the telescope M situated over the ing line of the corresponding telescope M parallel with the axis of the pivots m the telescope M on the left hand gun is then directed to this level scale N by rotating the body K K K If the axis of the left hand body K K K were parallel with the axis of rotation of the one situated on the right, the center point of the cross wires would coincide in the field of view of the left hand telescope with the'zero point 8 of the'level scale N." i i As, however, the two axes of rotation, as

. is to be assumed, are not yet parallel, the

- above'or below the zero point 3. By rotatcenter point, of'the cross wires must point to a pboint on the division" n of the level scale T which lies a definite amount'ih ing the right hand body K K IQ, the telescope M mounted thereon, is directed (after the incandescent lamp m has been swung aside) to the level scale 1 ,011 which scale the height h of that point (coinciding with the center point of the cross wires) which lies at the same heightas the zero point dot the first level scale N is read as. 1 Then the point with the height (hath) is determined on the second level scale P and to this point is directed the left hand telescope M by V rotatin this latter together with the body By this means the axis of rotation of the left hand body K K K has been set, in a first approximation, parallel with that of the one situated on the right. The left hand telescope d scale N, on which the center point of the cross wires now points to a point of the division n which lies by a considerably smaller amount :72? above or below the. zero point 3, than it did in the first case. Then the left hand telescope M is again directed on to the second level scale P and so adjusted in the manner described (by adjustment of the levelling screws 6 that the center point of its cross wires points to,

the point having the height (h -Ht). The axis of rotation of the left hand bodyJK K K then has been adjusted with a second ap proximation parallel with that of the right hand body. The operation described is repeated until on passing from one scale N to the other P no change in the height of the center point of the cross wires can be. detected. This case indicates that the two axes of rotation are parallel. -This.condition of things will commonly be attained even after a very short time.

It is not absolutely necessary at the commencement of the operation, as described, to so adjust the two telescopesthat thecenter points of their cross wires coincide exactly in the field of view of the left hand telescope.

adjustment approximately by the eye. In

is new again directed on to the It is even suflicient to make the this case'the incandescent lamp m may be dispensed with.

It is also not necessary, to mount the first level scale N, on the body K K K itself.

on the contrary, it may be mounted on the bearing J of the ship.

Claims? 7 V 1. In an apparatus for setting theax'is of rotation otone body in a position parallel with the axis of rotation 01 asecond-body, two rotatable bodies, a telescope fixed to each rotatable body, eachtelescope having a sighting line running transversely to the axis of rotation of the body appertaining or alongside it on the deekyD thereto, one of said rotatable bodies being 1 adjustably mounted, two level scales, one of said level scales being disposed adjacent the other oi. said. rotatable bodies whereby itcan be read oil through the telescope of thefirst rotatable'flbody, said second level scale being so disposed that it can appear in the field of view of both telescopes.

2. In an apparatus for setting the axis of rotation of one body in a position parallel with the axis of rotation of a second body, two rotatable bodies, a telescope secured to each rotatable body, each teleseope having a sighting line running transversely to the axis of rotation of the body appertaining thereto, adjustable bearings for supporting one rotatable body, two level scales, one of said level scales being disposed adjacent the 1 other rotatable body, whereby it is disposed in the line of sight of the telescope of the first mentioned rotatable body, said second level scale being so disposed that it can appear in the field of view of'both of said telescopes and an illuminating means associated with said second telescope.

The foregoing specification signed at Essen, Germany, this 4th day of March,

1921. I r. v

- DR. HERMANN HORT. 

